1166552121 has 32 divisors (see below), whose sum is σ = 1900862208. Its totient is φ = 621158400.

The previous prime is 1166552119. The next prime is 1166552137. The reversal of 1166552121 is 1212556611.

It is not a de Polignac number, because 1166552121 - 2¹ = 1166552119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1166552171) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19881 + ... + 52233.

It is an arithmetic number, because the mean of its divisors is an integer number (59401944).

Almost surely, 2^1166552121 is an apocalyptic number.

It is an amenable number.

1166552121 is a deficient number, since it is larger than the sum of its proper divisors (734310087).

1166552121 is a wasteful number, since it uses less digits than its factorization.

1166552121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32481.

The product of its digits is 3600, while the sum is 30.

The square root of 1166552121 is about 34154.8257351725. The cubic root of 1166552121 is about 1052.6921455474.

The spelling of 1166552121 in words is "one billion, one hundred sixty-six million, five hundred fifty-two thousand, one hundred twenty-one".